Viewing archive of Wednesday, 19 July 2017
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2017 Jul 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 200 Issued at 2200Z on 19 Jul 2017IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z Solar activity has been at low levels for the past 24 hours.
The largest solar event of the period was a C2 event observed at
19/0007Z from Region 2665 (S06, L=118). There are currently 0 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
with a chance for a C-class flares on day one (20 Jul) and expected to
be very low on days two and three (21 Jul, 22 Jul).
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak near 500 km/s. Electrons greater than 2 MeV at
geosynchronous orbit reached a peak level of 13630 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (20 Jul), quiet to unsettled levels on
day two (21 Jul) and quiet to active levels on day three (22 Jul).
III. Event Probabilities 20 Jul to 22 Jul
| Class M | 05% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 05% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 19 Jul 073 Predicted 20 Jul-22 Jul 075/075/075 90 Day Mean 19 Jul 077
V. Geomagnetic A Indices
Observed Afr/Ap 18 Jul 007/007 Estimated Afr/Ap 19 Jul 008/008 Predicted Afr/Ap 20 Jul-22 Jul 006/005-008/008-009/012
VI. Geomagnetic Activity Probabilities 20 Jul to 22 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 30% |
| Minor storm | 05% | 10% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 30% | 40% | 50% |
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